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accumulators acid amount ampere hours amperes apparatus applied arc lamps armature arranged bell brake C. F. Varley cable carbon carried cells cent charge circuit claim coils communication conductor connected construction copper cost Dated January described diameter directors disc distance dividend dynamo Edison effect electric lamps Electric Light Company ELECTRICAL REVIEW electricians electromotive force employed engine Exhibition experiments fact February February 11 feet Frederick Bramwell galvanometer give Gulf Stream gutta-percha heat Horace Davey Improvements incandescent lamps inches increase installation instruments insulated invention iron January 14 January 28 lead London Lord machine magnet manufacture material ment Messrs metal miles motor obtained Office ordinary paper patent pieces plates pole Prof railway received resistance result running secondary batteries Sellon shares Sir Horace specification station Street submarine sulphate tele Telegraph Company Telephone Company tion underground volts welding wires
Page 61 - PM He is in the garb of a Quaker, with a brown greatcoat on, which reaches nearly down to his feet. He is in the last compartment of the second first-class carriage.
Page 261 - FELKIN, HM— Technical Education in a Saxon Town. Published for the City and Guilds of London Institute for the Advancement of Technical Education.
Page 62 - A pen attached to the other end immediately began to write the message on a sheet of paper moved under it by a simple mechanism, and the entire message was written in full in the presence of the committee, each word being spelled completely and without abridgment, in fifty-two seconds, being at the average rate of five words and four-tenths per second ! By this instrument, therefore, it is practicable to transmit intelligence to a distance of upwards of 1000 miles, at the rate of 19,500 words per...
Page 108 - I claim as my invention — 1. An electric' lamp for giving light by incandescence, consisting of a filament of carbon of high resistance, made as described, and secured to metallic wires, as set forth. 2. The combination of carbon filaments with a receiver made entirely of glass and conductors passing through the glass, and from which receiver the air is exhausted, for the purposes set forth.
Page 109 - I have carbonized and used cotton and linen thread, wood splints, papers coiled in various ways, also lamp-black, plumbago, and carbon in various forms, mixed with tar and kneaded so that the same may be rolled out into wires of various lengths and diameters.
Page 50 - Having now described and particularly ascertained the nature of the said invention, and the manner in which the same is or ntay be used or carried into effect, I would observe, in conclusion, that I do not confine or restrict myself to the precise details or arrangements which I have had occasion to describe or refer to...
Page 230 - ... electromotive force; for example, if a thousand pounds of copper is required to transmit a given amount of power with a given loss, and it is desired to double the distance with the same weight of copper, then the electromotive force must be doubled. Again, with the same cross-section of conductor, the distance over which a given amount of power can be transmitted will vary as the square of the electromotive force.
Page 9 - We have no hesitation in saying there are young engineers — and a good many old engineers too — who can read this book, not only with profit, but pleasure ; and this is more than can be said of most works on heat." — The Engineer, "The volume bristles from beginning to end with practical examples culled from every department of technology. In these days of rapid book-making it is quite refreshing to read through a work like this, having originality of treatment stamped on every page.
Page 165 - CGS units per gramme. So that, if ordinary steel of average quality be 100,000, manganese steel is 20. This represents the permanent magnetism. Prof. Barrett, by different methods, has determined the susceptibility — that is, the induced magnetisation — in a uniform field. Compared with iron as 100,000, manganese steel was found to be 300. In fact, it is very wonderful, judging by muscular sense, to find no sensible force required to move this steel, even in the most powerful magnetic field that...